There is a new pull request by pbui against master on the void-packages repository

https://github.com/pbui/void-packages mpv
https://github.com/void-linux/void-packages/pull/15820

mpv: update to 0.30.0.
- Updated libplacebo to 1.21.0
- Bumped vlc (due to libplacebo)

- Changes: https://github.com/mpv-player/mpv/releases/tag/v0.30.0
- Tested with audio and video (x86_64)

A patch file from https://github.com/void-linux/void-packages/pull/15820.patch is attached